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NXP Semiconductors MMA6527KWR2
- Part No.:
- MMA6527KWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA6527KWR2.pdf
- Description:
- ACCELEROMETER 120G SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,489
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Product details
Overview
MMA6527KWR2 from NXP Semiconductors (formerly Freescale) is a dual-axis, SPI-interface, over-damped lateral accelerometer with ±120g full-scale range per axis, 12-bit digital output, and AEC-Q100 Grade 1 qualification for automotive airbag deployment systems.
For engineers reviewing the MMA6527KWR2 datasheet, MMA6527KWR2 pinout, MMA6527KWR2 application, or MMA6527KWR2 equivalent, key selection criteria include its programmable arming outputs per axis, twelve selectable low-pass filter options (50–1000 Hz), offset cancellation with <0.25 LSB/s slew rate, and Pb-free 16-pin QFN (6×6 mm) package.
Technical Context
The MMA6527KWR2 integrates dual over-damped MEMS g-cells with independent sigma-delta ADCs, IIR low-pass filtering, and configurable arming logic. Its internal 8 MHz oscillator feeds a programmable DSP path supporting 12-bit signed/unsigned SPI output at sample rates determined by LPF configuration (e.g., 64/fOSC or 128/fOSC).
Each axis features independent register-controlled arming functions (ARM_X/ARM_Y), selectable PCM or open-drain output modes, and dedicated offset monitoring with ±100 LSB thresholds. The device implements CRC-protected register arrays, OTP-trimmed sensitivity, and factory-programmed self-test deflection values for production validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±120g per axis - enables detection of high-g crash events in frontal/side impact airbag triggers |
| Digital Output Resolution | 12-bit signed or unsigned SPI - provides 4096-count dynamic range with LSB/g sensitivity of 16.0 |
| Low-Pass Filter Options | 12 configurations (50–1000 Hz) - allows tuning bandwidth to match vehicle-specific crash pulse profiles |
| Supply Voltage | 3.3 V or 5.0 V single supply - supports legacy 5V automotive ECUs and modern 3.3V microcontrollers |
| Operating Temperature | −40°C to +105°C - meets AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted airbag controllers |
| Package | 16-pin QFN, 6 mm × 6 mm, Pb-free - surface-mount compatible with automated reflow assembly and thermal performance optimized for automotive PCBs |
| Self-Test Output Change | 363–605 LSB at ±120g range - enables in-system functional verification without mechanical stimulus |
Pinout & Package
Pb-free 16-pin QFN package (6 mm × 6 mm, Case 2086-01) with exposed die attach pad internally connected to VSS. Pin 1 is VREGA (analog supply); corner pads are internally tied to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREGA | Analog supply input | Must be decoupled to VSSA with ≥1 μF X7R ceramic capacitor; powers analog sensor front-end and regulators |
| VSS, VSSA | Digital and analog ground | Separate return paths required to minimize noise coupling between digital SPI interface and analog acceleration sensing |
| VCC, VREG | Digital supply inputs | VCC powers core logic; VREG supplies digital circuitry - each requires ≥0.1 μF decoupling to respective ground |
| CS, SCLK, MOSI, MISO | SPI interface signals | Standard 4-wire SPI with internal pullup on CS and pulldown on SCLK/MOSI - supports up to 8.4 MHz clock (tSCLK ≥ 120 ns) |
| ARM_X / ARM_Y | Configurable arming outputs | Programmable as open-drain active-low/high or PCM output proportional to axis acceleration - directly drives airbag squib enable logic |
| TEST/VPP | Factory programming voltage | Must be tied to VSS in application; not used during normal operation or field programming |
| N/C (Pins 14, 15) | No-connect terminals | Not internally bonded - may be left floating or tied to VSS per layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| Dual-axis independent arming | ARM_X and ARM_Y pins support separate crash detection logic per axis - eliminates single-point failure in multi-directional impact scenarios |
| Twelve programmable LPF settings | Four-pole and three-pole filter options from 50 Hz to 1000 Hz - enables precise matching to vehicle-specific crash pulse frequency content |
| Offset cancellation with long averaging | 6.29 s averaging period and <0.25 LSB/s slew rate - suppresses thermal drift while maintaining fast response to crash events |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +105°C operation with 100% final test - ensures reliability in automotive safety-critical airbag control units |
| Integrated self-test with stored deflection values | Factory-trimmed STDEFL_X/Y registers provide axis-specific nominal deflection targets - enables deterministic pass/fail validation without external equipment |
Applications
| Frontal Impact Detection | Side-Impact Detection |
|---|---|
Use Scenario: Detecting rapid deceleration during head-on collisions to trigger driver/passenger airbags within 20 ms. IC Role / Device Role / Timing Role: Dual-axis accelerometer providing real-time X-axis (longitudinal) acceleration data with <200 μs step response and programmable arming threshold. Use Value: ±120g range and 400 Hz LPF option capture high-frequency crash pulses; ARM_X output asserts within 1.51 μs to initiate squib firing sequence. | Use Scenario: Identifying lateral acceleration exceeding 30g during T-bone or side-swipe impacts to deploy side-curtain and seat-mounted airbags. IC Role / Device Role / Timing Role: Y-axis (lateral) sensing element with independent arming function and 200 Hz LPF configuration for optimal side-impact signature discrimination. Use Value: Cross-axis sensitivity <±4% prevents false triggering from longitudinal braking; ARM_Y output drives isolated side-impact controller with <2.5 ms activation time. |
| Roll-Over Sensing | Crash Data Recorder Trigger |
Use Scenario: Monitoring angular acceleration and sustained lateral g-forces during vehicle rollover events to deploy roof-rail airbags before roof contact. IC Role / Device Role / Timing Role: Dual-axis inertial sensor supplying synchronized X/Y acceleration data to MCU for roll-rate estimation via integrated low-pass filtering and 12-bit resolution. Use Value: 50 Hz LPF mode suppresses high-frequency noise while preserving slow-roll dynamics; offset cancellation maintains baseline stability over temperature. | Use Scenario: Initiating high-speed logging of vehicle dynamics data (acceleration, timing, status) immediately before and after crash detection for EDR compliance. IC Role / Device Role / Timing Role: Accelerometer providing validated, CRC-protected SPI data stream with timestamp alignment to system clock via internal oscillator synchronization. Use Value: Self-test capability confirms sensor integrity pre-crash; 12-bit signed output preserves directionality for post-event forensic analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-axis automotive accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA6525KWR2 | ±105g full-scale range per axis; 18.2 LSB/g sensitivity; identical pinout and interface | Lower g-range suitable for less aggressive crash pulse profiles; reduced self-test output (414–690 LSB) | Select when system-level crash testing validates ≤105g requirement and cost optimization is prioritized |
| ADXL312WBRMZ-RL | 3-axis, 13-bit output, I²C/SPI interface; ±180g range; no integrated arming outputs | Requires external logic for arming function; broader bandwidth (1600 Hz LPF); RoHS-compliant but not AEC-Q100 qualified | Consider only for non-safety-critical applications where 3-axis data and higher resolution outweigh absence of AEC-Q100 and dedicated arming pins |
Compared with MMA6525KWR2, the MMA6527KWR2 delivers higher crash margin (±120g vs. ±105g) and greater self-test signal amplitude, while ADXL312WBRMZ-RL offers 3-axis coverage but lacks automotive qualification and hardware arming outputs essential for airbag deployment timing.
Availability
MMA6527KWR2 is available at Aetrix Electronics and suitable for automotive airbag control units, crash data recorders, and rollover protection systems requiring stable component supply across extended production lifecycles.
Supply support for MMA6527KWR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The MMA65xx family was designed specifically for automotive safety systems, with emphasis on high-reliability crash detection, integrated arming logic, and AEC-Q100 qualification to meet ISO 26262 ASIL-B requirements.
FAQ
What is the full-scale range of the MMA6527KWR2 accelerometer?
The MMA6527KWR2 has a full-scale range of ±120g on both the X-axis and Y-axis. This range is factory-configured and fixed for this specific part number, enabling reliable detection of high-magnitude crash events in automotive airbag systems. The 12-bit digital output yields a sensitivity of 16.0 LSB/g, and the device maintains this range across its full operating temperature range of −40°C to +105°C.
Does the MMA6527KWR2 support both 3.3V and 5V supply voltages?
Yes, the MMA6527KWR2 supports single-supply operation at either 3.3 V or 5.0 V. Its power supply architecture includes separate VCC (core logic), VREG (digital circuitry), and VREGA (analog circuitry) inputs, each with defined voltage tolerances: VCC accepts −0.3 V to +7.0 V, while VREG and VREGA operate from −0.3 V to +3.0 V. Decoupling capacitors (0.1 μF and 1 μF X7R ceramics) are required per the datasheet to ensure stable regulation and noise immunity.
How does the arming output functionality work on the MMA6527KWR2?
The MMA6527KWR2 provides two independent arming outputs: ARM_X and ARM_Y. Each can be configured via the DEVCFG register as either an open-drain active-low output with pullup current, open-drain active-high output with pulldown current, or a PCM signal proportional to acceleration. Activation delay is as low as 1.51 μs in unfiltered mode, making it suitable for time-critical airbag deployment. Unused pins must remain unconnected per design guidelines.
What low-pass filter options are available on the MMA6527KWR2?
The MMA6527KWR2 offers twelve programmable low-pass filter (LPF) options: six configurations with 4-pole response (50 Hz, 150 Hz, 200 Hz, 400 Hz, 500 Hz, and 1000 Hz) and six with 3-pole response (100 Hz, 300 Hz, 400 Hz, 800 Hz, 1000 Hz, and 400 Hz). Filter selection is controlled independently per axis via LPF_X[3:0] and LPF_Y[3:0] bits in the DEVCFG_X/Y registers, allowing optimization for different crash pulse characteristics on each axis.
Is the MMA6527KWR2 qualified for automotive safety applications?
Yes, the MMA6527KWR2 is AEC-Q100 qualified (Revision G, May 2007) and classified as a SafeAssure solution. It is rated for Grade 1 operation (−40°C to +105°C ambient), undergoes 100% final test verification, and includes built-in diagnostics such as CRC-protected register arrays, offset monitoring, and factory-calibrated self-test deflection values. These features support compliance with ISO 26262 functional safety requirements for ASIL-B airbag systems.
MMA6527KWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y
- Acceleration Range:
- ±120g
- Sensitivity (LSB/g):
- 16
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 3.135V ~ 5.25V
- Features:
- Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA6527KWR2 FAQ
1.How can I place an order for MMA6527KWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA6527KWR2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MMA6527KWR2 reliable?
The price and inventory of MMA6527KWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA6527KWR2 is usually 5 days.
3.What payment methods are accepted for MMA6527KWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA6527KWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA6527KWR2?
MMA6527KWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA6527KWR2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MMA6527KWR2?
For technical support, including MMA6527KWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA6527KWR2 requirements.
6.How does Aetrix verify that MMA6527KWR2 is sourced from the original manufacturer or authorized distributors?
All MMA6527KWR2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMA6527KWR2 meets industry standards.
7.What is the process for return or replacement of MMA6527KWR2?
All MMA6527KWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA6527KWR2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MMA6527KWR2 part is unused and in its original packaging.
Return procedure for MMA6527KWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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